• Support PF! Buy your school textbooks, materials and every day products Here!

Find hte sum of series

  • Thread starter rcmango
  • Start date
234
0
1. Homework Statement

heres the equation: http://img255.imageshack.us/img255/1669/untitledfa5.jpg [Broken]

2. Homework Equations

i think we use cos(x)

3. The Attempt at a Solution

i know that cos(x) = cos(pi)

so the limit is -1?

whats the sum, i'm a bit confused.
must be in simplest form
what must i show. help.
 
Last edited by a moderator:

Answers and Replies

Dick
Science Advisor
Homework Helper
26,258
618
I don't think you can express the sum much more simply than -1. The 'limit' you are talking about is the 'sum', right?
 
arildno
Science Advisor
Homework Helper
Gold Member
Dearly Missed
9,946
130
What you must show is that the infinite series representation of [itex]\cos(\pi)[/itex] is identical to the infinite series given in the exercise.
 
234
0
excellent, okay ya its simple it is only -1. I just wasn't sure what they wanted to see. thanks
 

Related Threads for: Find hte sum of series

  • Last Post
Replies
10
Views
3K
  • Last Post
Replies
17
Views
2K
  • Last Post
Replies
7
Views
3K
  • Last Post
Replies
3
Views
927
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
11
Views
952
Top